X-ray or gamma ray systems or devices – Photographic detector support – Dental
Patent
1989-09-22
1991-07-16
Fields, Carolyn E.
X-ray or gamma ray systems or devices
Photographic detector support
Dental
378154, 378168, 378185, 378186, G03B 4204
Patent
active
050330462
ABSTRACT:
A device of x-ray intensifying and anti-diffusion screens, for intra-oral dental radiographic plates of the kind employing a hermetic chassis cassette with a front and a back protective plate and having at least one intensifying plate emulsified with "rare earths", preferably gadolinium or lanthanum salts, related to one of the faces of the radio-graphic film to which it is faced. There is also an anti-diffusion plate made of metallic threads of predetermined thickness arranged in horizontal and vertical rows. This anti-diffusion plate is interposed between the object to by x-rayed and the intensifying screen and radiographic film, presenting between the anti-diffusion reticulated plate and the front intensifying screen, a separating plate of compressible material, and between the back protective plate and the back intensifying plate and/or the radiographic film, a plate of non-radiographic material, preferably lead.
REFERENCES:
patent: 3848136 (1974-11-01), Seldin
patent: 4108308 (1978-08-01), Franke et al.
patent: 4142101 (1979-02-01), Yin
Fields Carolyn E.
Jaskiewicz Edmund M.
Porta David P.
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